Cells of the Nervous System

Question 1

What is the name for cells that are specialised for rapid communication?

Answer 1

Neurons

Question 2

Neuronal cell bodies and dendrites occur in what type of matter?

Answer 2

Gray matter

Question 3

What does white matter consist of?

Answer 3

Axons

Question 4

What do the axons consist of within the white matter?

Answer 4

Myelin sheaths

Question 5

What is the function of myelin sheaths in axons?

Answer 5

Increase the velocity of conduction

Question 6

The fastest signals, known as action potentials are carried in the surface membrane of what?

Answer 6

Axons

Question 7

Where do neurons communicate with one another?

Answer 7

Synapses

Question 8

What are the glial cells?

Answer 8

Astrocytes, Oligodendrocytes, ependymal cells and microglia

Question 9

Astrocytes occur throughout what?

Answer 9

The brain stem and spinal cord

Question 10

What do oligodendrocytes produce?

Answer 10

Myelin

Question 11

What glial cell becomes phagocytes when local injury of inflammation occurs?

Answer 11

Microglial cells

Question 12

What are the neuroglia cells of the PNS in nerves?

Answer 12

Schwann cells

Question 13

What are the neuroglia cells of the PNS in ganglia?

Answer 13

Satellite cells

Question 14

What are the two classes of cells found in the nervous system?

Answer 14

Neurons and nerve cells

Question 15

What matter makes up the CNS?

Answer 15

Gray and White matter

Question 16

Which matter are nerve cell bodies lacking?

Answer 16

White matter

Question 17

The part of the cell that includes the nucleus is called?

Answer 17

Cell body

Question 18

What are dendrites?

Answer 18

Short branching processes that receive signals from other neurons

Question 19

What conducts impulses away from the cell body?

Answer 19

Axons

Question 20

Where do efferent axons end?

Answer 20

Striated muscle fibers

Question 21

The large neurons of a nucleus are called?

Answer 21

Principle cells

Question 22

Myelin is laid down in the PNS by?

Answer 22

Schwann cells

Question 23

Myelin is laid down in the CNS by?

Answer 23

Oligodendrocytes

Question 24

Interruptions in the myelin sheath is called?

Answer 24

Nodes of Ranvier

Question 25

A nerve fiber consists of?

Answer 25

The axons and the surrounding myelin sheath

Question 26

What is ependyma?

Answer 26

Simple cuboidal to columnar epithelium that lines the ventricular system